Hinuku 2 Posted October 7, 2011 Report Share Posted October 7, 2011 Hi, I am having trouble with this question: The graph shows a normal curve for the random variable X, with mean μ and standard deviation . It is known that p(X 12) = 0.1. (a) The shaded region A is the region under the curve where x 12. Write down the area of the shaded region A. It is also known that p(X 8) = 0.1. (b) Find the value of μ, explaining your method in full. © Show that = 1.56 to an accuracy of three significant figures. (d) Find p(X 11). I actually have no idea how to solve this problem from point c). I would be glad if someone could explain!! x is greater than equal than 12 and smaller than equal than 8* 1.56 = standard deviation* Thanks Reply Link to post Share on other sites

## Recommended Posts

## Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.